Table 1 in Revision of Eocene electric rays (Torpediniformes, Batomorphii) from the Bolca Konservat-Lagerst atte, Italy, reveals the first fossil embryo in situ in marine batoids and provides new insights into the origin of trophic novelties in coral reef fishes

Table 1. Morphometric data for all examined specimens of † Titanonarke Carvalho, 2010 from the Eocene Monte Postale site, Bolca Lagerst¨atte. Abbreviations (see the morphological scheme in the Supplemental material): AOW, antorbital cartilage width; CFL, caudal fin length; CFD, caudal fin depth; CLO, clasper length; CPD, caudal peduncle depth; D1B, first dorsal fin base length; D2B, second dorsal fin base length; DCS, dorsal caudal space; DL, disc length; DW, disc width; HL, head length; IDS, interdorsal space; MOW, mouth width; P2A, pelvic fin anterior margin length; P2B, pelvic fin base length; P2S, pelvic fin span; PCS, space from pelvic fin insertion to the caudal fin origin; PD1, predorsal distance up to the first dorsal fin; PD2, predorsal distance up to the second dorsal fin; PDI, pelvic fin insertion to first dorsal fin origin; PDO, pelvic fin origin to first dorsal fin origin; PGW, snout tip to the level of the greatest disc width; PIW, body width at pectoral fin insertions; POR, preoral length; PP2, prepelvic length; SL, standard length; TAL, tail length; TBW, tail base at pelvic fin origin; TL, total length. † Titanonarke molini (Jaekel, 1894)† Titanonarke megapterygia sp. nov.MGP-PD 26275/6MCSNV IG.VR.67290MCSNV IG.91128/9MCSNV IG.135581MCSNV IG.VR.91359MCSNV IG.135576Measurementsmm% SLmm% SLmm% SLmm % SLmm% SLmm% SLAOW206.625.3217.429.0196.223.126.1–28.128.4174.227.8CFL80.99.9––75.08.8––––97.415.6CFD28.43.5––26.13.1––––36.05.8CLO––––70.58.3––––––CPD20.22.525.53.415.91.9––2.32.313.72.2D1B––64.68.656.66.7––––––D2B50.06.147.96.451.36.0––––––DCS140.217.2109.814.6119.314.0––––––DL353.143.2341.245.5371.643.733.8–42.843.2334.553.4DW387.047.4406.654.2347.840.9––56.356.9349.855.9HL178.121.8172.523.0204.424.022.2–23.623.8171.827.4IDS––53.67.1–––––––MOW80.69.999.913.395.511.213.6–12.712.887.113.9P2A77.29.5103.113.788.710.4––8.18.2141.622.6P2B134.616.5108.314.481.39.6––11.711.8107.917.2P2S206.825.3208.527.8––––23.723.9211.933.8PCS356.043.6358.547.8––––44.945.4241.738.6PD1––468.162.4––––––––PD2632.377.4586.378.2––––––––PDI––83.111.1––––––––PDO––181.324.2––––––––PGW198.424.3187.225.0195.223.0––23.723.9172.227.5PIW150.318.4173.723.2180.321.2––22.122.3173.027.6POR73.08.962.68.385.410.07.7–9.69.756.29.0PP2328.540.2307.341.0348.441.034.8–44.444.8299.047.7SL816.8100.0750.2100.0850.4100.0––99.0100.0626.2100.0TAL493.560.4436.858.2502.059.0––55.456.0318.350.8TBW94.811.6109.714.6132.715.6––13.213.3103.516.5TL897.7109.9––925.4108.8––––722.6115.4表1. 产自博卡化石库（Bolca Lagerstätte）始新世蒙特波斯塔莱遗址的所有检视过的†泰坦电鳐属（†Titanonarke Carvalho, 2010）标本的形态测量数据。缩写说明（详见补充材料中的形态示意图）：AOW：眶前软骨宽度（antorbital cartilage width）；CFL：尾鳍长度（caudal fin length）；CFD：尾鳍高度（caudal fin depth）；CLO：交合突长度（clasper length）；CPD：尾柄高度（caudal peduncle depth）；D1B：第一背鳍基底长（first dorsal fin base length）；D2B：第二背鳍基底长（second dorsal fin base length）；DCS：尾背间隙（dorsal caudal space）；DL：体盘长（disc length）；DW：体盘宽（disc width）；HL：头长（head length）；IDS：背鳍间距（interdorsal space）；MOW：口宽（mouth width）；P2A：腹鳍前缘长（pelvic fin anterior margin length）；P2B：腹鳍基底长（pelvic fin base length）；P2S：腹鳍展幅（pelvic fin span）；PCS：腹鳍附着点至尾鳍起点间距（space from pelvic fin insertion to the caudal fin origin）；PD1：第一背鳍前距（predorsal distance up to the first dorsal fin）；PD2：第二背鳍前距（predorsal distance up to the second dorsal fin）；PDI：腹鳍附着点至第一背鳍起点间距（pelvic fin insertion to first dorsal fin origin）；PDO：腹鳍起点至第一背鳍起点间距（pelvic fin origin to first dorsal fin origin）；PGW：吻端至体盘最大宽度处间距（snout tip to the level of the greatest disc width）；PIW：胸鳍附着点处体宽（body width at pectoral fin insertions）；POR：吻前长（preoral length）；PP2：腹鳍前距（prepelvic length）；SL：标准长度（standard length）；TAL：尾长（tail length）；TBW：腹鳍起点处尾基宽（tail base at pelvic fin origin）；TL：总长度（total length）。 †泰坦电鳐（†Titanonarke molini, Jaekel, 1894）、†巨鳍泰坦电鳐新种（†Titanonarke megapterygia sp. nov.） 所用标本编号依次为：MGP-PD 26275/6、MCSNV IG.VR.67290、MCSNV IG.91128/9、MCSNV IG.135581、MCSNV IG.VR.91359、MCSNV IG.135576 测量单位：毫米（mm）、占标准长度百分比（% SL） 以下为各形态测量项的具体数值： AOW（眶前软骨宽度）：206.6 25.3 217.4 29.0 196.2 23.1 26.1–28.1 28.4 174.2 27.8 CFL（尾鳍长度）：80.9 9.9 –– –– 75.0 8.8 –––– 97.4 15.6 CFD（尾鳍高度）：28.4 3.5 –– 26.1 3.1 –––– 36.0 5.8 CLO（交合突长度）：–––– 70.5 8.3 –––– –– CPD（尾柄高度）：20.2 2.5 25.5 3.4 15.9 1.9 –– 2.3 2.3 13.7 2.2 D1B（第一背鳍基底长）：–– 64.6 8.6 56.6 6.7 –––– –– D2B（第二背鳍基底长）：50.0 6.1 47.9 6.4 51.3 6.0 –––– –– DCS（尾背间隙）：140.2 17.2 109.8 14.6 119.3 14.0 –––– –– DL（体盘长）：353.1 43.2 341.2 45.5 371.6 43.7 33.8–42.8 43.2 334.5 53.4 DW（体盘宽）：387.0 47.4 406.6 54.2 347.8 40.9 –– 56.3 56.9 349.8 55.9 HL（头长）：178.1 21.8 172.5 23.0 204.4 24.0 22.2–23.6 23.8 171.8 27.4 IDS（背鳍间距）：–– 53.6 7.1 –––– –– –– MOW（口宽）：80.6 9.9 99.9 13.3 95.5 11.2 13.6–12.7 12.8 87.1 13.9 P2A（腹鳍前缘长）：77.2 9.5 103.1 13.7 88.7 10.4 –– 8.1 8.2 141.6 22.6 P2B（腹鳍基底长）：134.6 16.5 108.3 14.4 81.3 9.6 –– 11.7 11.8 107.9 17.2 P2S（腹鳍展幅）：206.8 25.3 208.5 27.8 –––– 23.7 23.9 211.9 33.8 PCS（腹鳍附着点至尾鳍起点间距）：356.0 43.6 358.5 47.8 –––– 44.9 45.4 241.7 38.6 PD1（第一背鳍前距）：–– 468.1 62.4 –––– –––– PD2（第二背鳍前距）：632.3 77.4 586.3 78.2 –––– –––– PDI（腹鳍附着点至第一背鳍起点间距）：–– 83.1 11.1 –––– –––– PDO（腹鳍起点至第一背鳍起点间距）：–– 181.3 24.2 –––– –––– PGW（吻端至体盘最大宽度处间距）：198.4 24.3 187.2 25.0 195.2 23.0 –– 23.7 23.9 172.2 27.5 PIW（胸鳍附着点处体宽）：150.3 18.4 173.7 23.2 180.3 21.2 –– 22.1 22.3 173.0 27.6 POR（吻前长）：73.0 8.9 62.6 8.3 85.4 10.0 7.7–9.6 9.7 56.2 9.0 PP2（腹鳍前距）：328.5 40.2 307.3 41.0 348.4 41.0 34.8–44.4 44.8 299.0 47.7 SL（标准长度）：816.8 100.0 750.2 100.0 850.4 100.0 –– 99.0 100.0 626.2 100.0 TAL（尾长）：493.5 60.4 436.8 58.2 502.0 59.0 –– 55.4 56.0 318.3 50.8 TBW（腹鳍起点处尾基宽）：94.8 11.6 109.7 14.6 132.7 15.6 –– 13.2 13.3 103.5 16.5 TL（总长度）：897.7 109.9 –– –– 925.4 108.8 –––– 722.6 115.4